mab-9 expression was altered in a
vab-7 mutant background.
mab-9 is normally first expressed in embryos at the 1.5-fold stage in the nuclei of three cells around the presumptive rectum, B, F and one hyp 7 nucleus. In a
vab-7(
e1562) mutant background, however, the domain of
mab-9 expression was more extensive, with three to four extra
mab-9 expressing nuclei appearing more posterior to the usual
mab-9 expressing nuclei. It is difficult to unambiguously assign these nuclei in a
vab-7 background, because of the disruption in normal cell positioning in this mutant, but they appear to be muscle nuclei, and would normally be expected to express
vab-7.